cause it to split and frozen flow switches or pressure
switches can malfunction which control the burner.
These pictures show different reasons for coil pipe
failure:
The HE Series (all electric) contains multiple heating
elements to generate significant temperature rise in the
heat exchange process. The heat exchanger contains
a tubular pipe system that directs the water flow through
the heating elements.
TEMPERATURE SWITCH: The burner is equipped
with a high temperature limit switch, which will shut off
the burner when the water temperature becomes too
hot. Hot water machines are equipped with an
adjustable thermostat so that the operator can control
the outlet water temperature. The burner will
automatically cycle on and off to maintain the desired
temperature.
STEAM INSTRUCTIONS: If your unit is steam
capable, install the green steam nozzle, turn thermostat
to 250° F.
PRESSURE/FLOW SWITCH: The heater/burner is
equipped with either a pressure switch or a flow switch.
When the trigger on the spray gun is squeezed, water
begins to move through the coil and is pressurized. The
flow/pressure switch turns the heater/burner on and
begins to heat the water. Whenever the water spray
stops or if the water is shut off, the burner will shut off.
WARNING: Burner should fire only when the
trigger is squeezed and spraying water, if it comes
on at any other time, shut off machine and have it
serviced.
DIAGNOSTIC LIGHT: The burner diagnostic light on
the rocker switch (if equipped) can help in determining
problems with the burner. The red light indicates that
power is going to the fuel solenoid valve. The burner
should be firing and heating the water whenever the red
light is on. When the trigger on the spray gun is
released or if the temperature set point is exceeded, the
red light will go off and the burner will stop firing.
NATURAL GAS/PROPANE GAS BURNER: The gas
burner uses a vertical coil with a natural draft aspirating
type burner. It has electronic ignition for an auto-lighting
burner pilot with a 90 second lockout for safety. If the
burner does not light within 90 seconds, turn the burner
switch off and on again to start the ignition sequence
over.
The vertical coil can be connected to an exhaust flue
and must have a draft diverter mounted at a maximum
30 inches above the unit. The exhaust flue must never
run horizontal. Check your local code for exhaust flue
size requirements.
Do not store any flammable material under or near
burner area!
NATURAL GAS /
PROPANE IGNITION SENSOR / ROD: After extended
ignition arcing, insulating deposits may form on the
ignition rod reducing the arc intensity. Also, because of
the high heat zone beneath the burner, premature
failure of the rubber insulation covering on the ignition
wire may cause arcing to a ground before reaching the
pilot ignition rod.
Warning! When performing any tests on ignition
systems, do not touch the ignition rod. Ignition
circuit generates over 10,000 volts, electrical shock
can result!
DIESEL FIRED BURNER: The diesel-
fired burner is a forced draft pressure-
atomizing burner. Diesel fuel is
sprayed out of an atomizing nozzle,
mixed with air, and ignited by a high
voltage spark. The flame is directed
towards the coils of pipe, which in turn,
heats the water flowing through it. Use clean #2
DIESEL FUEL for the burner or substitute #1 diesel,
light fuel oil, or Kerosene if diesel is not available.
NOTE: Use of summer blend fuels during cold weather
is not recommended. During winter months, check the
fuel grade, as well as consider changing to kerosene or
adding winter diesel fuel additives to avoid coil sooting
and maintain optimum burner performance.
AIR BAND adjustments may need to be made to
compensate for higher elevations, or if more than a
trace of smoke is observed in the burner exhaust. The
ELECTRODES may need to be cleaned and adjusted
periodically. These adjustments have to be made
precisely and should be performed only by qualified
personnel. Set between #1 & #2 on the smoke gauge.
Pipe chart: For 450,000btu
Failed weld or failed material
covered under warranty
Failed pipe seam
covered under warranty
Blow out from pipe
weakened by freezing
Pipe rupture due to
freezing or obstruction
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